Index: Lib/test/test_buffer.py
===================================================================
--- Lib/test/test_buffer.py	(revision 85856)
+++ Lib/test/test_buffer.py	(working copy)
@@ -21,6 +21,13 @@
                     self.assertEqual(b[start:stop:step],
                                      s[start:stop:step])
 
+    def test_newbuffer_interface(self):
+        # Test that the buffer object has the new buffer interface
+        # as used by the memoryview object
+        s = "".join(chr(c) for c in list(range(255, -1, -1)))
+        b = buffer(s)
+        m = memoryview(b) # Should not raise an exception
+        self.assertEqual(m.tobytes(), s)
 
 def test_main():
     with test_support.check_py3k_warnings(("buffer.. not supported",
Index: Objects/bufferobject.c
===================================================================
--- Objects/bufferobject.c	(revision 85856)
+++ Objects/bufferobject.c	(working copy)
@@ -792,6 +792,16 @@
     return size;
 }
 
+static int buffer_getbuffer(PyBufferObject *self, Py_buffer *buf, int flags)
+{
+	void *ptr;
+	Py_ssize_t size;
+	if (!get_buf(self, &ptr, &size, ANY_BUFFER))
+		return -1;
+	return PyBuffer_FillInfo(buf, (PyObject*)self, ptr, size,
+		self->b_readonly, flags);
+}
+
 static PySequenceMethods buffer_as_sequence = {
     (lenfunc)buffer_length, /*sq_length*/
     (binaryfunc)buffer_concat, /*sq_concat*/
@@ -813,6 +823,7 @@
     (writebufferproc)buffer_getwritebuf,
     (segcountproc)buffer_getsegcount,
     (charbufferproc)buffer_getcharbuf,
+    (getbufferproc)buffer_getbuffer
 };
 
 PyTypeObject PyBuffer_Type = {
@@ -835,7 +846,7 @@
     PyObject_GenericGetAttr,                    /* tp_getattro */
     0,                                          /* tp_setattro */
     &buffer_as_buffer,                          /* tp_as_buffer */
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GETCHARBUFFER, /* tp_flags */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GETCHARBUFFER | Py_TPFLAGS_HAVE_NEWBUFFER, /* tp_flags */
     buffer_doc,                                 /* tp_doc */
     0,                                          /* tp_traverse */
     0,                                          /* tp_clear */